英语词汇“progressive lens”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	progressive lens
释义	progressive lens noun (usually progressive lenses) An eyeglass lens having a smooth transition between parts with different focal lengths, correcting for vision at all distances.Trifocals can have visible lines or progressive lenses.... Among those given progressive lenses, vision deteriorated at only half the rate of the other kids. Bifocals have been on their way out ever since the invention of progressive lenses, which gradually change the visual viewing area for distance and reading.
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